http://e-repository.perpus.iainsalatiga.ac.id/18999
http://e-repository.perpus.iainsalatiga.ac.id/19350
http://e-repository.perpus.iainsalatiga.ac.id/19002
http://e-repository.perpus.iainsalatiga.ac.id/17794
http://e-repository.perpus.iainsalatiga.ac.id/19348